5m-7/m

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Solution for 5m-7/m equation: 


D( m )

m = 0

m = 0

m = 0

m in (-oo:0) U (0:+oo)

5*m-(7/m) = 0

5*m-7*m^-1 = 0

5*m^1-7*m^-1 = 0

(5*m^2-7*m^0)/(m^1) = 0 // * m^2

m^1*(5*m^2-7*m^0) = 0

m^1

5*m^2-7 = 0

5*m^2-7 = 0

DELTA = 0^2-(-7*4*5)

DELTA = 140

DELTA > 0

m = (140^(1/2)+0)/(2*5) or m = (0-140^(1/2))/(2*5)

m = (1*35^(1/2))/5 or m = (-35^(1/2))/5

m in { (-35^(1/2))/5, (1*35^(1/2))/5} 

m in { (-35^(1/2))/5, (1*35^(1/2))/5 }

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